Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Electrical property
Patent
1977-04-08
1979-02-27
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Electrical property
D1004
Patent
active
D02511835
REFERENCES:
patent: D236594 (1975-09-01), Smith
patent: 2460830 (1949-02-01), Knam
patent: 2771580 (1956-11-01), Schott
patent: 3818325 (1974-06-01), Boshers
patent: 3875510 (1975-04-01), Beauchane
Holtje Nelson C.
Phifer Earl Cooper
Seltzer Donald M.
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